Might not be a textbook but a very good supplement to a textbook would be the following book **Yet Another Introduction to Analysis** by **Victor Bryant**. As a prerequisite the book assumes knowledge of basic calculus and no more.The following is the amazon link [http://www.amazon.com/Another-Introduction-Analysis-Victor-Bryant/dp/052138835X/ref=sr_1_2?ie=UTF8&qid=1417845189&sr=8-2&keywords=victor+bryant][1].


  [1]: http://www.amazon.com/Another-Introduction-Analysis-Victor-Bryant/dp/052138835X/ref=sr_1_2?ie=UTF8&qid=1417845189&sr=8-2&keywords=victor%20bryant